Post by pitobread on Apr 23, 2018 22:47:02 GMT -5
So who has a Dellorto 30 or a Keihin 33 PWK for me on the cheap?
I may even use a Mikuni TMX 30 or 33 if I could find one! *Shock*
I have this consistent problem with my home brew carburetors I cannot shake. Bike will lean out at Constant part throttle, transitioning between pilot and main and if I chop throttle the revs will stay up high like its starving, If i blip throttle on to main a few times it settles down. I have had a 55/140 in it and it would barely idle and would burble and break up on the main and the skinniest needle with the longest taper I had in it (oddly enough its a OKO needle, I bought the polini kit and it was useless.. all the needles are so close to the same) and it would still do it. I used 2 different castings to see if it was the problem (I bored another carb even bigger). I drilled out the idle circuit in one of the carbs and left one stock. I checked the jet well for air leaks. I then realized its running the float bowl dry. So I drilled out the passages in the casting for more fuel and opened up the orifice the needle goes in. It still seems to do it even with fuel pissing out the overflow at idle.. I think I just need a bigger carb. I have to admit defeat.
Other than that it's a monster for sure when I get a moment of power out of it.
Going to the cycle salvage to dig thru old carbs tomorrow after work.
I may even use a Mikuni TMX 30 or 33 if I could find one! *Shock*
I have this consistent problem with my home brew carburetors I cannot shake. Bike will lean out at Constant part throttle, transitioning between pilot and main and if I chop throttle the revs will stay up high like its starving, If i blip throttle on to main a few times it settles down. I have had a 55/140 in it and it would barely idle and would burble and break up on the main and the skinniest needle with the longest taper I had in it (oddly enough its a OKO needle, I bought the polini kit and it was useless.. all the needles are so close to the same) and it would still do it. I used 2 different castings to see if it was the problem (I bored another carb even bigger). I drilled out the idle circuit in one of the carbs and left one stock. I checked the jet well for air leaks. I then realized its running the float bowl dry. So I drilled out the passages in the casting for more fuel and opened up the orifice the needle goes in. It still seems to do it even with fuel pissing out the overflow at idle.. I think I just need a bigger carb. I have to admit defeat.
Other than that it's a monster for sure when I get a moment of power out of it.
Going to the cycle salvage to dig thru old carbs tomorrow after work.
